*{
    margin: 0;
    padding: 0;
}

body{
    min-width: 700px;
    font-family: 'Microsoft YaHei';
}

/* 头部 */
.header{
    background-color: #07cac9;
    height: 80px;
    overflow: hidden;
}

/* logo区 */
.header .logo{
    position: relative;
    top: 50%;
    margin-top: -24px;
    float: left;
    width: 60%;
    padding-left: 100px;
}

/* 导航条 */
.header .nav{
    float: right;
    margin-right: 100px;
    overflow: hidden;
}

.header .nav ul{
    height: 80px;
    overflow: hidden;
}

.header .nav ul li{
    float: left;
    list-style-type: none;
    padding-left: 15px;
    padding-right: 15px;
    line-height: 80px;
}

.header .nav ul li a{
    text-decoration: none;
    color: white;
}

/* 经过导航时导航项背景颜色发生变化 */
.header .nav ul li:hover{
    background: red;
}

/* banner区 */
/* banner图 */
.main .banner img{
    width: 100%;
    height: 600px;
}

/* banner图遮盖层 */
.main .mask_layer_banner{
    width: 100%;
    height: 600px;
    position: absolute;
    background-color: black;
    top: 80px;
    opacity: 0.3;
}

/* 登录块 */
.main .register{
    width: 550px;
    position: absolute;
    top: 380px;
    height: 400px;;
    margin-top: -200px;
    left: 50%;
    margin-left: -275px;
    z-index: 2;
}

/* 前三个输入框 */
.main .register input{
    width: 493px;
    height: 39px;
    border: 2px grey solid;
    margin-bottom: 20px;
    position: relative;
    left: 50%;
    margin-left: -255px;
}

/* 文本域 */
.main .register textarea{
    width: 493px;
    border: 2px grey solid;
    margin-bottom: 20px;
    position: relative;
    left: 50%;
    margin-left: -255px;
    height: 105px;
    padding-top: 10px;
}

/* 前三个输入框 和 文本域 */
.main .register textarea, input{
    padding-left: 10px;
    font-size: 16px;
    background-color: transparent;
    color: white;
}

/* 鼠标经过 文本域 时边框颜色发生变化 */
.main .register textarea:hover{
    border-color: #07cac9;
}

/* 鼠标经过 输入框 时边框颜色发生变化 */
.main .register input:hover {
    border-color: #07cac9;
}

/* 按钮 */
.main .register button{
    border: 2px grey solid;
    width: 125px;
    height: 39px;
    position: relative;
    left: 50%;
    margin-left: -63px;
    background-color: transparent;
    color: grey;
    cursor: pointer;
}

/* 鼠标滑过提交按钮时，按钮背景颜色发生变化 */
.main .register button:hover{
    background: #07cac9;
}

/* ABOUT区 */
/* 清除浮动 */
.about{
    overflow: hidden;
}

/* 标题 */
.about h2{
    font-size: 28px;
    /* text-align: center; */
    padding: 35px 0 10px 0;
    width: 110px;
    margin: 0 auto;
}

/* 线 */
.about .line{
    display: block;
    width:30px;
    height: 2px;
    background-color: #07cac9;
    margin:0 auto;
    margin-bottom: 10px;
    transition-duration: 1s;
}

/* 为标题添加动画效果 */
.about > h2:hover + span {
    width: 110px;
    transition-duration: 1s;
}

/* 标题介绍文字 */
.about .word{
    text-align: center;
    color: grey;
    line-height: 27px;
    margin-bottom: 20px;
}

/* 介绍图片 */
.about .troduce_image{
    position: relative;
    width: 568px;
    height: 380px;
    left: 50%;
    margin-left: -284px;
    margin-bottom: 50px;
    display: block;
    float: left;
}

/* 图片左侧文字 */
.about .word_left{
    position: relative;
    left: 180px;
    width: 45%;
    overflow: hidden;
    height: 350px;
    float: left;
}

/* 图片左侧上部文字 */
.about .word_left .left_top {
    text-transform: uppercase;
    margin-left: 40px;
    font-size: 24px;
}

/* 图片左侧上部第一行文字 */
.about .word_left .left_top .one {
    padding-left: 10px;
}

/* 图片左侧下部文字 */
.about .word_left .left_bottom {
    width: 348px;
    height: 224px;
    font-size: 14px;
    position: relative;
    border: 1px #c5c5c5 solid;
    background:rgba(255, 255, 255, 0.5);
    padding: 20px 0 0 20px;
    line-height: 25px;
    text-align: left;
}

/* 图片左侧下部文字按钮 */
.about .word_left .left_bottom button {
    margin-top: 30px;
    height: 45px;
    width: 102px;
    color: white;
    background-color: black;
    border: 0;
    border-radius: 10px;
    cursor: pointer;
}

/* 鼠标经过图片左侧下部按钮时，按钮样式发生变化 */
.about .word_left .left_bottom button:hover{
    background: transparent;
    border: 1px black solid;
    color: black;
}

/* 图片右侧文字 */
.about .word_right{
    float: left;
    width: 20%;
    margin-left: 120px;
    font-weight: bold;
    transition-duration: 2s;
}

/* 图片右侧上部文字 */
.about .word_right .right_top {
    margin-bottom: 35px;
}

/* 图片右侧上部 和 下部文字 */
.about .word_right .right_top, .right_bottom{
    width: 234px;
    height: 140px;
    text-align: center;
    box-shadow: 2px 2px 5px #07cac9;
}

/* 图片展览区 */
.about .image_exhibition{
    width: 100%;
    height: 700px;
    margin-top: 470px;
    overflow: hidden;
}

/* 图片展览区四块 */
.about .image_exhibition .block{
    width: 25%;
    height: 700px;
    float: left;
}

/* 图片展览区图片 */
.about .image_exhibition .block .ex_up{
    height: 350px;
    width: 475px;
}

/* 图片展览区文字模块 */
.about .image_exhibition .block .ex_bottom{
    background: #07cac9;
    height: 350px;
    width: 425px;
    color: white;
    text-align: left;
    padding-left: 50px;
}

/* 图片展览区文字模块标题 */
.about .image_exhibition .block .ex_bottom h3{
    height: 75px;
    line-height: 75px;
    font-weight: normal;
    font-size: 24px;
}

/* 图片展览区文字模块第一段 */
.about .image_exhibition .block .ex_bottom .first_section{
    height: 75px;
}

/* 图片展览区文字模块第二段 */
.about .image_exhibition .block .ex_bottom .second_section {
    height: 90px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* 图片展览区文字模块按钮 */
.about .image_exhibition .block .ex_bottom button {
    height: 45px;
    width: 102px;
    color: white;
    background-color: black;
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    position: relative;
    left: 50%;
    margin-left: -81px;
    margin-top: 20px;
}

/* 鼠标经过图片展览区内部按钮时，按钮样式发生变化 */
.about .image_exhibition .block .ex_bottom button:hover {
    background: transparent;
    border: 1px black solid;
    color: black;
}

/* 图片展览区文字模块第一块添加箭头 */
.about .image_exhibition .block:nth-child(1):after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    left: 474px;
    border-left: 25px solid #07cac9;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    top: 1890px;
    z-index: 99;
}

/* 图片展览区文字模块第二块添加箭头 */
.about .image_exhibition .block:nth-child(2):before{
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    left: 451px;
    border-right: 25px solid #07cac9;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    top: 1530px;
    z-index: 99;
}

/* 图片展览区文字模块第三块添加箭头 */
.about .image_exhibition .block:nth-child(3):after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    left: 1424px;
    border-left: 25px solid #07cac9;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    top: 1890px;
    z-index: 99;
}

/* 图片展览区文字模块第四块添加箭头 */
.about .image_exhibition .block:nth-child(4):before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    left: 1402px;
    border-right: 25px solid #07cac9;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    top: 1530px;
    z-index: 99;
}

/* gallery区 */
/* gallery区标题 */
.gallery .title{
    padding: 35px 0 10px 0;
    text-align: center;
}

/* 线 */
.gallery .line{
    display: block;
    width:30px;
    height: 2px;
    background-color: #07cac9;
    margin:0 auto;
    margin-bottom: 10px;
    transition-duration: 1s;
}

/* 为标题添加动画效果 */
.gallery .title:hover + .line {
    width: 120px;
    transition-duration: 1s;
}

/* 标题介绍文字 */
.gallery .word {
    text-align: center;
    color: grey;
    line-height: 27px;
    margin-bottom: 20px;
}

/* 介绍图片 */
.gallery .introduce_image{
    position: relative;
    width: 1200px;
    height: auto;
    left: 50%;
    margin-left: -600px;
    word-spacing: 25px;
    margin-bottom: 120px;
}

/* 介绍图片第一行 */
.gallery .introduce_image .first_row{
    margin-bottom: 25px;
    overflow: hidden;
}

/* 介绍图片标注第一行 */
.gallery .introduce_image .first_row .label {
    width: 340px;
    height: 64px;
    float: left;
    margin-right: 30px;
    background: black;
    color: white;
    line-height: 64px;
    padding-left: 20px;
    text-transform: uppercase;
    position: relative;
    bottom: 10px;
    word-spacing: 7px;
}

/* 介绍图片标注第二行 */
.gallery .introduce_image .second_row .label {
    width: 340px;
    height: 64px;
    float: left;
    margin-right: 30px;
    background: black;
    color: white;
    line-height: 64px;
    padding-left: 20px;
    text-transform: uppercase;
    position: relative;
    bottom: 10px;
    word-spacing: 7px;
}

/* 页脚 */
.footer{
    height: 80px;
    width: 100%;
    background: #07cac9;
    line-height: 80px;
    text-align: center;
    color: white;
}